Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f19ed2b06d6e
Author: danhuang1202 <dhuang@mozilla.com>
Desc: Merge pull request #32735 from danhuang1202/1217463_deal_places_not_exist

Bug 1217463 - Deal with case where 'places' bookmark is missing, r=se…

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https://hg.mozilla.org/integration/gaia-central/rev/399f32d85ffe
Author: danhuang1202 <danhuang1202@gmail.com>
Desc: Bug 1217463 - Deal with case where 'places' bookmark is missing, r=seanlee

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https://hg.mozilla.org/integration/gaia-central/rev/6fc58056c473
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #32629 from wilsonpage/1020699

Bug 1020699 - Migrate remaining apps to <gaia-header>

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https://hg.mozilla.org/integration/gaia-central/rev/6ada357f87a9
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1020699 - Migrate remaining apps to <gaia-header>

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "b4f3fad58aca51bcc6568d0f922114de02c80285", 
+        "git_revision": "f847caf6826baca3d31543c9e2593abfff0d8b70", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e7f9224a05f6c166088a39a4a1dc54b683d078af", 
+    "revision": "f19ed2b06d6e5614cfc2f4bef4038092a9de4afd", 
     "repo_path": "integration/gaia-central"
 }